執行 ❯
獲取您
自己的 PHP
伺服器
×
更改方向
更改主題，深色/淺色
前往 Spaces
<!DOCTYPE html> <html> <body> <h1>Regex Modifier: [0-9]</h1> <p>How many digits are in the text "W3Schools has been live since 1999"?:</p> <?php $txt = "W3Schools has been live since 1999"; $pattern = "/[0-9]/"; echo preg_match_all($pattern, $txt); ?> <p>The matches were found here:</p> <?php echo preg_replace($pattern, "#", $txt); ?> <p>(Each match was replaced by a # character)</p> </body> </html>
正則表示式修飾符：[0-9]
文字“W3Schools has been live since 1999”中有多少個數字？
5
匹配項在此處找到
W#Schools has been live since ####
（每次匹配都替換為“#”字元）
